Intel confirmed that it has received subpoenas to disclose documents relating to pricing agreements with customers, but in a statement said "the company believes its business practices are well within U.S. law".

AMD has complained about anti-competitive practices by Intel, including the provision of rebates if computer manufacturers stop using AMD, in a number of markets in Europe and the Far East.

Tom McCoy, executive vice president and COO of AMD, said in a statement: "Intel must now answer to the Federal Trade Commission, which is the appropriate way to determine the impact of Intel practices on US consumers and technology businesses. In every country around the world where Intel's business practices have been investigated, including the decision by South Korea this week, antitrust regulators have taken action."